 
            sync-spy-a (chan 1)
            sync-spy-b (chan 1)
+
+           seal-spy-a (chan 1)
+           seal-spy-b (chan 1)
+
            ack-ch-spy (chan 2)
            offer-ch-spy (chan 10)
            status-spy (chan 2)

                                         :payload-node (:node payload-node-b-2)})
                (extensions/on-change sync (:node payload-node-b-2) #(>!! sync-spy-b %))

                (extensions/touch-node sync (:node/completion (:nodes payload-a)))
                (extensions/touch-node sync (:node/completion (:nodes payload-b)))


       (tap (:offer-mult coordinator) offer-ch-spy)
       (tap (:ack-mult coordinator) ack-ch-spy)
       
       (doseq [[peer pulse shutdown payload sync-spy seal-spy]
               (map vector peers pulses shutdowns payloads sync-spies)]
         (extensions/write-node sync (:node peer)
                                 {:id (:uuid peer)
